[TheForge] New forge

[Bruce .]

Geoff,

Have you checked the available resources about burner design?
Here's one:  http://ronreil.abana.org/Forge1.shtml

There's a book available (which I haven't read):
http://www.amazon.com/Gas-Burners-Forges-Furnaces-Kilns/dp/1879535203/ref=sr_1_1?s=books&ie=UTF8&qid=1335958147&sr=1-1

A 1" burner sounds a bit on the large size if, by that, you mean 1"
schedule 40 pipe.  My burners are all 3/4" pipe.  A #70 drill orifice
will give you good heat but not welding heat.  You should not need
larger than a #60.  This assumes you have a propane regulator that can
be cranked up to 20psi or so (though that's not always needed)

A side note:
I'd known for years that the range of a regulator could be changed by
swapping out the adjusting spring.  I recently discovered that some
regulators thrown away with gas grills have a screw-cap over the
adjusting spring.  These regulators normally put out low pressure --
probably less than 1 psi (I haven't measured it).  Swap out the spring
and you can go much higher.  You'll need to find, modify, or make a
coil spring to fit the space.  The length, OD, and flatness of the
ends must match the original spring.

On Wed, May 2, 2012 at 2:55 AM, Geoff Nelson <gjn.pub at gmail.com> wrote:
> Normally I lurk but it is quiet.
>
> I have managed to do something in-between working on my house and
> working for the money to work on my house. I built a small gas forge
> from an old propane tank. I lined it with wool impregnated with a
> rigidiser. No idea what the product is as I bought it from a refractory
> supplier as it was over runs from a commercial project. The bottom of
> the forge has a hard refractory brick to rest material on. I am using a
> 1 inch side arm burner. Yesterday I decided to make a stirrer for dry
> wall compound and got a length of 8 mm reo to forging heat in less than
> 2 minutes from cold. I am very happy with the performance.
>
> However I am not entirely happy with my burner so I am going to have to
> do some work on that. I think I do not have the correct ratio between
> gas jet size and burner open area. I don't know the size of the orifice
> so I will play with open area rather than rebuild the whole burner.
>
> Geoff
> Drouin, AU
>
> On 2/05/2012 1:18 PM, Mike Spencer wrote:
>> Dan wrote:
>>
>> dk>  testing.....I haven't gotten a letter from theforge in 7 days....
>>
>> and Frosty replied:
>>
>> jf>  Been hanging around, not much to report...
>>
>> Same, more or less. Doing odds and ends getting ready for gardening
>> time -- fix up electric deer fence, haul home some manure, compost the
>> past year's kitchen garbage, intall a new pea trellis.  No excitement
>> at the anvil.
>>
>> jf>  ...except it's been warm and I'm enjoying it.
>>
>> In Nova Scotia, two 80F days in mid *March* -- unheard-of.  If it hits
>> 80 for a week in August, everybody complains about the heat.  Now
>> three nights of hard frost at the very tail end of April.
>>
>>
>> Just keeping Dan's mailbox warm, y'unnerstand. ;-)
>>
>>
>> - Mike
>>
> ______________________________________________________________
> TheForge mailing list
> Home: http://mailman.qth.net/mailman/listinfo/theforge
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:TheForge at mailman.qth.net
>
> TheForge mail list group photo site is
> http://www.photoworks.com
> Login: blacksmithblacksmith at hotmail.com
> Password: anvil
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html



-- 
Bruce
NJ